Results 1 to 10 of about 67,757 (265)

Spreading Speed in A Nonmonotone Equation with Dispersal and Delay

open access: yesMathematics, 2019
This paper is concerned with the estimation of spreading speed of a nonmonotone equation, which involves time delay and nonlocal dispersal. Due to the time delay, this equation does not generate monotone semiflows when the positive initial value is given.
Xi-Lan Liu, Shuxia Pan
doaj   +3 more sources

Experimental study of liquid droplets impact on powder surface: The application of effective dimensionless parameters in analysis [PDF]

open access: yesE3S Web of Conferences, 2022
Spreading dynamics of liquid droplets impacting onto powder bed are experimentally studied using high-speed photography. Dimensionless numbers—We, Re, the modified We* and Re∗ corrected by substrate deformation—are used to analyze the impact behaviors of
Li Siqi, Yu Hourong, Fang Haisheng
doaj   +1 more source

Effect of Contact Angle Hysteresis on Evaporation Dynamics of a Sessile Drop on a Heated Surface [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2022
Contact angle hysteresis (CAH) is a significant factor affecting the drop motion on solid substrates. A model of CAH is introduced to explore the influence of CAH on the dynamics of a sessile drop on a uniformly heated surface, and a two-dimensional ...
X. M. Ye   +3 more
doaj   +1 more source

Research on Disease Spreading Behavior Oriented to Three-Layer Complex Networks

open access: yesApplied Sciences, 2022
Disease spreading in multi-layer complex networks often spreads among multiple populations with the help of media. In order to reveal the cross-layer spreading characteristics of diseases and control the cross-layer spreading of diseases by analyzing the
Zhonglin Ye   +5 more
doaj   +1 more source

Persistence versus extinction for two competing species under a climate change

open access: yesNonlinear Analysis, 2017
This paper considers effects of a climate-induced range shift on outcomes of two competitive species, which is modeled by a reaction–diffusion system with the increasing growth rates of species along a shifting habitat gradient. Analytical conditions are
Zewei Zhang, Wendi Wang, Jiangtao Yang
doaj   +1 more source

Effect of Modified Yarn Path on Ring Spinning on the Moisture Management Properties of the Cotton Fabrics

open access: yesJournal of Natural Fibers, 2021
This study discusses the effect of modified yarn path in ring spinning such as straight path, left diagonal path and right diagonal path on moisture management properties of the cotton fabric like wetting time, absorption time, spreading area, spreading ...
A. Jebastin Rajwin, C. Prakash
doaj   +1 more source

Dependence of wetting on cavitation during the spreading of a filler droplet on the ultrasonically agitated Al substrate

open access: yesUltrasonics Sonochemistry, 2022
The cavitation characteristics during the spreading of a pure Sn liquid droplet subjected to ultrasonication were studied for the first time through high-speed photography to reveal the wetting mechanism. Ultrasonic vibration realized the spreading of Sn
Zhengwei Li   +5 more
doaj   +1 more source

Dynamics of a time-periodic and delayed reaction-diffusion model with a quiescent stage

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2016
In this paper, we study a time-periodic and delayed reaction-diffusion system with quiescent stage in both unbounded and bounded habitat domains. In unbounded habitat domain $\mathbb{R}$, we first prove the existence of the asymptotic spreading speed and
Shuang-Ming Wang, Liang Zhang
doaj   +1 more source

Bistable traveling wave solutions in a competitive recursion system with Ricker nonlinearity

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2014
Using an abstract scheme of monotone semiflows, the existence of bistable traveling wave solutions of a competitive recursion system is established. From the viewpoint of population dynamics, the bistable traveling wave solutions describe the strong ...
Shuxia Pan, Jie Liu
doaj   +1 more source

A Novel Apparatus for the Simulation of Powder Spreading Procedures in Powder-Bed-Based Additive Manufacturing Processes: Design, Calibration, and Case Study

open access: yesJournal of Manufacturing and Materials Processing, 2023
Powder-bed-based additive manufacturing processes (PBAM) are sensitive to variations in powder feedstock characteristics, and yet the link between the powder properties and process performance is still not well established, which complicates the powder ...
Salah Eddine Brika, Vladimir Brailovski
doaj   +1 more source

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